When it comes to working out, men and women are from different planets

The experts say there's no one-size-fits-all answer, but each sex could learn something from the other.

Vive La Difference

Motivation, the experts say, is one major fitness difference between the sexes.

Often, "men work out because they like to be bigger," says Vincent Perez, PT, director of sports therapy at Columbia University Medical Center Eastside in New York. "Pecs, biceps, quads ? men are after bulk."

"Guys have an agenda," adds Pamela Peeke, MD, author of Body-for-LIFE for Women: A Woman's Plan for Physical and Mental Transformation. "They have a specific goal, and there's always a number involved." She calls this the "Home Depot" approach to working out: "They have a blueprint and they just want to get it done."

For many men, "working out is a sport, and they do it because it's fun, it's competitive, and it's something that they've always done," says Lori Incledon, author of Strength Training for Women. "For women, fitness is a superficial issue. They do it because it will help them look better."

Men like to look like they've been working out, says Peeke, "the sweatier the better. When was the last time you heard a woman say she wanted to sweat?"

Often, she says, "women think everyone else is looking at them so they're afraid to put on workout clothes or get out there in public with their cellulite jiggling. Do men care what they look like when they're working out? Of course not!"

One thing men and women have in common, according to Incledon: They tend to overlook the health benefits of exercise.

"Very rarely does anyone think about fitness like they should, which is just to stay healthy," says Incledon.

Mars vs. Venus Workouts

Once they get past their initial reluctance, women tend to have a balanced approach to fitness, says Perez. Their workouts are more likely to include a mix of cardio, strength training, and mind-body practices such as yoga or tai chi.